Added static, updated formItems to generate today's date for maximumDate, and fixed serialization issues.
Added static, updated formItems to generate today's date for maximumDate, and fixed serialization issues.

chb/ResearchKit,allen7wang/ResearchKit,mluedke2/ResearchKit,KaiCode2/ResearchKit,oliverschaefer/ResearchKit,allen7wang/ResearchKit,boland25/ResearchKit,YuanZhu-apple/ResearchKit,weijentu/ResearchKit,oliverschaefer/ResearchKit,md0u80c9/ResearchKit,chb/ResearchKit,mluedke2/ResearchKit,md0u80c9/ResearchKit,jeremiahyan/ResearchKit,allen7wang/ResearchKit,md0u80c9/ResearchKit,YuanZhu-apple/ResearchKit,chb/ResearchKit,weijentu/ResearchKit,KaiCode2/ResearchKit,YuanZhu-apple/ResearchKit,jeremiahyan/ResearchKit,weijentu/ResearchKit,boland25/ResearchKit,md0u80c9/ResearchKit,oliverschaefer/ResearchKit,boland25/ResearchKit,cornelltech/ResearchKit,cornelltech/ResearchKit,shazino/ResearchKit,chb/ResearchKit,shazino/ResearchKit,jeremiahyan/ResearchKit,boland25/ResearchKit,cornelltech/ResearchKit,oliverschaefer/ResearchKit,mluedke2/ResearchKit,shazino/ResearchKit,KaiCode2/ResearchKit,YuanZhu-apple/ResearchKit,weijentu/ResearchKit